After having a few mintcasts without a Website Of The Week, I thought it might be helpful if the listeners suggested a few of our own. That way, you've got an "evergreen" list in case something else arises...

Floss Manualshttp://en.flossmanuals.net/
Free manuals on a large list of Open Source programs. Downloads in either Epub or PDF for reading off-line. Personally, found the articles on the command line, and using Inkscape invaluable.